Most people think building codes are just static rulebooks. They aren't. They are reactive histories of tragedies, and in Ontario, they are uniquely distinct from the rest of the world.
For decades, Ontario followed a standard North American model: if you have a high-rise, you generally need two exits. To save space, architects often utilized "scissor stairs"—two stairwells sitting side-by-side within the same shaft, separated by a thin fire-rated wall. ontario building code
Exempt does not mean unregulated; municipal property standards or other laws may apply. Most people think building codes are just static rulebooks